Transmission-gearing.



E.. .L CAMPBELL.

TRNSMiSSfON GEAHING.

APPLICATIQN man 1mm, 19H.

9 gg-35% l Patenmd Ama 1.8, 39115.

2 SHEETS-SHEET 1.

L. J. CAMPBELL.

TRANSMISSION GEARING.

APPLICATION FILED IAN. 9, IQII.

bly@ Mmmm Apr. I3, 1915.

2 SHEETS-SHEET 2.

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LEON il. CMJPBELL, 0F CHICAGO, ILLINOIS.

TMSMISSION-GJEARING.

Maasai.

Application filed January 9, 191111.

To all 'whom it may concern.'

Be it known that ll, LEON J. CAMPBELL, a citizen of the United States,and residing at Chicago, in the county of Cook and State of illinois,have invented a new and useful lim rovement in Transmission-Gearing, ofwhich the following is a complete specification.

'lhe main objects of this invention are t0 provide an improvedtransmission gearing of Ilthe selective gear type; to provide vatransmission gearing having improved mechanism for connecting theselective or loose gears to their shaft; to provide a transmissiongearing having improved` mechanism for operating the means for lockingthe selective gears to the shaft; to provide a transmission gearing inwhich the selective gears may be positively connected with their shaftwithout danger of injuring the parts; and to provide a very cheap,simple and durable transmission gearing which is easy to operate and notliable to get out of repair.'

A specific embodiment of the invention is illustrated in theaccompanying drawings, in which:

Figure 1 is a horizontal section of a transmission gearing embodied inthis invention with the high speed gears locked for operation. Fig. 2 isa section taken on line ltr-A. of Fig. l. Fig. 3 is a vertical sectiontaken through the bearings for the transmission shaft and showing saidshaft in elevation. Fig. 4 is a fragmentary section 'of one of the`selective gears and ythe transmission shaft, showing one of the lockingkeys in locking position. Fig.- 5 is a View similar to Figui but showingthe locking key in release position. Fig. 6 is a fragmentary,perspective view of one of the selective gears showing the locking seat.Fig. 7 is a perspective view of one of the locking keys and' the rockingyoke therefor. Fig. 8 is a section of the transmission shaft and of oneof the rocking vyokes with the latter holding the key in lockingposition. 'Fig 9 is a view similar to Fig. 8 but with the rocking yokeholding the key in release position. Fig. 10 is an enlarged section ofone of the yoke arms taken on line 10 of Fig. 9.

linthe vcrnfistrnotion shown, the gear cas ing 1 is provided withbearings 2 and 3 which are journaled the drive shaft t and thetransmission shaft 5. ftigidly secured upon one of said shafts, asherein shown Specification of Letters Patent.

.Patented Apr. t3, i915.

serial no. 601,509.

the drive shaft 4, `is a plurality of 'drive gears 6, 7, 8 and 9, whichdecrease in size in the order named.

Loosel'y mounted upon the transmission shaft 5 1s a plurality ofselective or loose gears 10, 11, 12, and 13, which increase in size inthe order named. The loose gears 10, 11 and l2 mesh with the drive gears6, 7, and 8, respectively, and provide the forward speeds for thetransmission shaft. The loose gear 13, which is the reverse gear mesheswith an idle pinion 14 which is journaled in a bearing 15 on' the casingand meshes. with the drive gear 9. Each of the gears 10, 11, 12, and 13is provided in its bore with a locking recess 16 which extendscireumferentially of the bore a suiiicient distance to permit thelocking mechanism to act properly, and is provided with Haring orbeveled sides 17. At the rear end of each recess, that is the enddirected away from the direction of rotation ofthe gear, is a steelabutment plate 18 which is adapted to take the wear of the lockingmechanism on the gear. t

Extending longitudinally of the shaft 5 is a pair vof key seats 19 and20 ywhich are circular in cross section, and in which are the lockingkeys 21 and 22. Said keys are rounded on their inner sidescomplement-,ally with ythe key seats so as to permit them to rock freelyin their seats, and have their outer corners cut away, as at 23, for thegreater portion of their lengths so that they will not project out ofthe seats beyond the periphery of the shaft in any position of the key.rl`he remaining portionof the key, forming the locking lug 24, is curvedtransverselyy on its outer face in the same arc as the circumference ofthe shaft 5, so that when the key is in release position, as is shownin'Fig. 5, said portion or lug will be Hush with the periphery of theshaft, and the loose gears may travel over the same and rotate freely onthe shaft. Said lu s are of length to fit transversely of the loc ingrecesses 16 when they are brought into register with said recesses, andwhen in that position the keys may be rocked to turn one edge of the lugup into the recess in position to abut against the abutment plate t8, asshown more clearly in Figs. 2 and Ll, thereby locking the gear to theshaft. rlhe ends ofthe lateraledges or corners of the lugs areebeveledlongitudinally of the key to bear against the beveled sides 17' of therecesses 16, so that when the key is in locking position, with one edgeturned up into the recess 16, longitudinal movement of the key willcause the beveled portion 25 of the lug to bear against the beveledportion 17 of the recess, and since the beveled portion 25 is off centeron the key, the key will be rocked back to normal position where it maybe moved longitudinally of the shaft. For the purpose of moving the keyslongitudinally of the shaft to bring the locking lugs 24 into and out oflocking position with respect to the various loose gears, a groovedcollar 26 is loosely mounted on the shaft 5 outside of the casing 1, andthe outer ends of the keys 21 `andv22 extend through the collar. The key21 is provided with a boss 27 near its outer end and with a yoke 28 atits outer end and the key 22 is provided with a boss 27 at 2o its outerend and a yoke 29 near its outer end. The collar 26 is mounted on theshaft between the lugs and yokes, with the latter situated on oppositesides thereof, so that when the collar is moved longitudinally of theshaft it will move the keys therewith. A forked lever 30 is connectedwith the collar 26 which is slidably mounted on the shaft. 'lhe lever isadapted to operate the keys by moving the collar on the shaft. The lugs24 so are so situated on the keys that both cannot be in lockingposition at the same time, and.

so that the lug on the key 22 will lock the gears 10 and 12 to the shaft5, and the lug on the key 21 will lock the gears 11 and 13 to the shaft.The yokes 28 and 29 are olf center on the keys, that is the arm 31 of each yoke, or the arm which is on the same side of the key as the lockingVedge of the lug 24,V

is nearer the center of the key than is the au arm 32, and the distancebetween the arms is less than the diameter of the shaft 5. Said yokesare adapted to rock the keys 21 and 22 te bring the lugs 24 into and outof locking position. For this purpose the yokes straddie the shaft,which is provided on itsl sides along those portions over which theyokes travel with a plurality of oppositely disposed nrtches andshoulders which are adapted to rock the yoke. The collar 26 is ofsuflicient length to separate the yokes far enough apart so that neitheryoke can travel in the notches of the other yoke, and the notches are sodisposed that when one key is in lrcking position the other will be outof locking position, and so that there will be an interval between eachtwo selective gears when neither key will be in locking position and allof the ears will run idle.

To operate t e yoke 29 the shaft 5 is provided in one side with notches33 and 34 and shoulders 35 and 36, and in the other side with notches 37and 38 and shoulders 39 and 40, the notches in one side being disposedoppositely to the shoulders on the other side.

35 To operate the yoke 28, the shaft is provided in one side withnotches 41, 42, and 43, and

a shoulder 44, and in the other side with a notch 45 and shoulders 46,47, and 48, which are likewise oppositely disposed, and the notches andshoulders for the yoke 28 are 7c arranged in the reverse order to thosefor the yoke 29. The shoulders, with the exception of the shoulder 48,are provided by the surface of the shaft adjacent to the notches, whilethe shoulder 48 is provided by a 75 piece attached to the side of theshaft, and the notch 43, which is opposite the shoulder 48, is deeperthan the other notches so as to throw the yoke 28 in the reversedirection to lock the reverse gear 13 to the shaft 5. The 80 inner facesof the yoke arms are rounded or beveled, and the sides of the notchesare beveled so that when the collar 26- is moved longitudinally of theshaft the yoke arms will travel easily out of the notches and onto 8.5the shoulders and rock the keys into and out of locking position.

For the purpose of securing a quick rocking action of the keys,especlally when the keys are being thrown to locking position, a 9o Ushaped spring 49 is carried in an aperture in the central portion of theyoke which eX- tends transversely of the key. The spring is held in theyoke by means of a set screw 50 which is carried in the central portionof 95 the yoke and bears on the spring. The sides of the spring lie inrecesses in the inner faces of the yoke arms to points aboutdametrically opposite on the shaft, and then said sides normally turninwardly from the arms, in such a position that when the arm is on ashoulder or rounded portion of the shaft, the end of the spring will notbe come pressed but will curve beneath the shaft, and when the arm is ina notch the end of the spring will be compressed by the arm against thebottom of the notch.

F or the purpose of preventing the lugs 24 from causing the selectivegears to wear eccentric when the lugs are out of locking position,washers 51 of hard` metal are interposed between the gears and each isprovided with a notch 52 which opens from the aperture in the washer andis adapted to receive a pin 53 on the shaft which causes 115 the washerto rotate with the shaft. Each of the loose gears is provided with anotch 54 which permits the gear to be passed over the pin 53 intoposition on the shaft 5.

The operation of the construction shown 12o is as follows: When theparts are in the positions shown in the drawings, the gear 10 is lockedto the shaft 5, and the gears 11, 12, and 13 are running idle. In thisposition the arm. 32 of the yoke 29 is in the notch 33 125 of the shaft5, and the arm 31 is resting on the shoulder 39, and the lug 24 of thekey 22 is turned into the locking recess of the gear 10. The end of thespring 49 adjacent to the arm 32 is compressed against the bot- 130Maaate tom of the notch 33 and tends to rotate the key back to normalposition. The other end of the spring is relaxed, since it is out ofcontact with the shaft. Also in this position the arm 32 of the yoke 28is on the shoulder 46 and the arm 31 is in the notch 41, and the lug 24of the key 21 is held in release posi tion at a point between therecesses 16 Iof the gears l2 and 11, but nearer the recess in the gear12. When the collar 26 is moved away from the gear casing the beveledportion 25 of the lug 24 engages the beveled edge of the recess 16 ofthe gear 10 and tends to rotate the key 22 back to normal or releaseposition, and at the same time the arm 31 of the yoke 29 passes off theshoulder 39 into the notch 37, and the arm 32 of said yoke passes out ofthe notch 33 onto the shoulder 35, thereby assisting in turning the key22 back to,normal position and retracting the lug 24 into the key seat20. This movement compresses the end of the spring -49 against the arm31 of the yoke 29 and relaxes the oppo-l site end of the spring. Theyoke 28 moves simultaneously with'the yoke 29, and at the point wherethe lug 24 of the key 22 has just passed out of the locking recess ofthe gear 10, the lug 24 of the key 21 is about to enter the recess ofthe gear 11, and none of the gears are locked to the shaft. Furthermovement of the collar 26 in the same direction brings the arm 32 of theyoke 28 into the notch 45 and the arm 31 of said yoke onto the shoulder44, thereby rotating the key 21 to bring its lug 24 to locking positionto lock the gear 11 on the shaft. Further outward movement of the collarcauses the key 22 to lock the gear l2 to the shaft, and still furthermovement causes the arm 32 of the yoke 28 to travel onto the shoulder 48and the arm 31 of said yoke to travel into the notch 43, thereby.rockingv the key 21 in the reverse direction to lock the reverse gear13` to the shaft. lWhen the collar 26 is moved in the opposite directionon the shaft 5 the keys 21 and 22 travel` inwardly and lock the gears inthe reverse order. There is a point between each two adjacent gearswhere both keys are out of locking position, with the result that nopower is then applied to the shaft 5.

The casing 1 is a closed casing and its construction is made the subjectof a separate application filed Jan. 9, V1911, Serial No. 601,508.

As clearly shown in the drawings, and especially in Fig. 4 thereof, thelocking lug 24- of each key has a Contact face adapted, when the lug isin operative position,narnely, extending beyond the circumferentialsurface of the shaft 5, to be in Contact with the shoulder formed by theabutment plate 18. As shown in Figs. 4 and 5, the face of said abutmentplate 18, with which the contact faceof said lug 24 contacts or engages,is

preferably dat. Said abutment plate 18 is arranged in such manner thatits lug-engaging face extends upwardly and is inclined inwardly toward avertical plane passing through both the axes of rotation of the. shaft 5and the key 22, so that the pressure coming on said lug will act in aline oblique to a radial line passing through the axis of rotation ofthe lug and in a direction to press the opposite curved side of the lugagainst the concave surface of the key seat 2Ol with which said oppositeside is in contact. 'llhe contact face of the lug constitutes theshoulder-engaging portion of said lug. The base of said contact face ofthe lug or shoulderengaging portion thereof is at the junction of saidportion with the curved part of the lug in the key seat 20. `When thelug is in locking position, as shown in Fig. 4, a line drawn across thelug-engaging face of said abutment plate 18, in a direction toward theopposite side of the shaft 5, will pass at a point laterally spaced aconsiderable distance radially from the axis of rotation of said shaft,as will be plainly evidenced upon examination of Figs. 4 and 5 of thedrawings. lThe contact face or shoulder-engaging portion of said lug iscomplementary to the face of said plate 18 which said contact face ofsaid lug engages. f An important advantage is gained by thisconstruction in the locking lug, which will appear from the fol'-lowing: If the said Contact face or shoulderengaging portion were on aline radial to the shaft, the pressure of the locking shoulder 10o onthe lug would tend to press the lug in the direction of a linetangential to the'surface of the shaft, and such pressure would tend toshear or break od the part of the lug' which projects outside of thecircumference 105 of the shaft, because the direct ressure of theshoulder would then be unreslsted by the abutting of the lug against anyopposed resisting surface of the shaft. When, however, the lug andshoulder 18 are arranged 'ilo and iliade as described and shown, (theshoulder or plate 18 being at an inclination to the direction ofrotation of said shaft 5),

the pressure of the locking shoulder against the shoulder-engagingportion of the lug, 115 tends to press or force the lug directly towardthe opposite concave side of its seat, so that the tension or strain onthe lug is entirely a compressive one, tending to crush the lug, and notto shear or break off its part 120 which projects from the shaft andengages said locking shoulder on the wheel. The lug made as described,therefore, is capable of withstanding, without injury, a pressuregreatly in excess of that which it would with- 125 stand if subject to abreaking or shearing strain only. This feature of construction in thelug is applicable to any form of clutch having a rocking or oscillatinglocking lug, and forms the Subj ect matter of my co-pend- 130 ingapplication Serial No. 834,075, filed April 24, 1914, the same being adivision of the present application. y

While I have shown and described but one specific embodiment of myinvention it Will be understood that various details of the constructionmay be varied or omitted` Without departing from the scope of theclaims.

I claim:

1. A transmission gearing, comprising a shaft, a plurality of' gearsloosely mounted on the shaft, a key movable longitudinally of theshaft', and means adapted when the key is moved longitudinally to rockthe key into and out of engagement with the gears.

2. A transmission gearing, comprising a shaft, a plurality of loosegears on the shaft, and a key movable longitudinally of the shaft andadapted to engage a part on said gearsand lock them to the shaft, therebeing ooacting means on the shaft and key adapt-- ed to rock the keyinto and out of engagement with the gears.

3. A transmission gearing, comprising a shaft, a plurality of gearsloosely mounted on the shaft and each having a locking recess therein, alongitudinally movable key on the shaft and having a lug thereon adaptedto engage in said recesses and lock the gears to the shaft, there beingcoacting parts on said lug and recesses adapted When the key is movedlongitudinally to rotate the key and Withdraw the lug from the recesses,means for moving the key longitudinally, and means for rotating saidgears.

4. A transmission gearing, comprising a shaft, a plurality of gearsloosely mounted on the shaft and having beveled recesses opening towardthe shaft, a key longitudinally movable on the shaft, and having a lugadapted to engage in said recesses when the key is rotated to oneposition, said lug having beveled ends adapted to engage the beveledportions of the recesses, means adapted to move the key longitudinallyand cause the beveled portions of the lug and recess to rock the key andwithdraw the lug from the recess, and means for rotating the gears.

5. A transmission gearing, comprising a shaft, a plurality of internallyrecessed gears loosely mounted on the shaft, a key movablelongitudinally of the shaft and adapted to lock the gears to the shaft,there being ooacting means on the.keys and recesses adapted when the keyis moved longitudinally to rock the key on the shaft and release thegears, and means for rotating said gears.

6. A transmission gearing, comprising a shaft having keyways extendinglongitudinally thereof, a plurality of internally recessed gears looselymounted on the shaft, keys in said keyways, and having means thereonadapted to engage in the recesses of and means or rotating the gears,there being ooacting means on the shaft and keys adapted to rock thekeys in the keyways and move the keys into and out o f engagement withthe recesses.

8. A transmission gearing, comprising a shaft having keyways therein,gears loosely mounted on the shaft, keys in said keyways, there beingcoacting means on the keys, and shaft adapted to rock the keys when thekeys are moved longitudinally of the shaft, and there being ooactingmeans on the gears and keys adapted when the keys are rocked to vlockand release the gears with respect to the shaft.

9. A transmission gearing, comprising a shaft having keyways therein,gears loosely mounted on the shaft, keys in said keyways, there beingooacting means on the keys and gears adapted to lock the gears to theshaft, and a yoke on each key, said shaft having means thereon adaptedto engage the yokes and rock the keys into and out of locking positionwhen the keys are moved longitudinally of the shaft.

l0. A transmission gearing, comprising a shaft having keyWays therein,Gears loosely mounted on the shaft, longitudinally movable keys in thekeyways, there being coacting means on the gears and keys adapted tolock the'- gears to the shaft, a yoke on each key, there beingalternating shoulders and notches on the shaft adapted to rock the yokesand throw the keys into and out of locking engagement with the gears,and means for rotating the gears.

l1. A transmission gearing, comprising a shaft having keyWays therein,gears loosely mounted on the shaft, longitudinally movable keys in thekeyways, there being coacting means on the gears and keys adapted tolock the gears to the shaft, a yoke on each key, said shaft havingalternating shoulders and notches adjacent to the yokes adapted to rockthe yokes and throw the keys into and out of lockino` engagement withthe gears, springs in said yokes adapted to engage the shaft and rockthe yokes with a quick action, and means for rotating the gears.

12. A transmission gearing, comprising a shaft, a plurality of rotativemembers mounted and adapted to turn on said shaft, and a key movablelongitudinally ofl the shaft and means adapted to rock the key into andout of posltion for engagement with said rotative members.

13. A. transmission gearing, comprising a shaft having a keyway therein,gears loosely mounted. on the shaft and having locking recesses openingto the shaft, a rotatable key in said keyway having a lu thereon adaptedto rock into and out of sai recesses, and means for moving the keylongitudinally.

14. A transmission gearing, comprising a shaft having a keyway therein,a plurality of gears loosely mounted on the shaft and each having alocking recess opening into its bore, a rockable key mounted in the key-Way and having a lug thereon adapted to be rocked into and out of saidrecesses, and means adapted to move the key longitudinally of the shaftand shift. the lug from gear to gear.

15. A. transmission gearing, comprisin a shaft having a keyvvay therein,a pluraty of gears loosely mounted on the shaft and each having alocking recess opening into its bore, a rockable key mounted in the key-Way and having a lug thereon adapted-to be rocked into and out of saidrecesses, Said key being provided with means adapted to engage parts onthe shaft and rock the key loosely mounted on the shaft, keys insaidkeyways, means adapted tomove the keys longitudinally of the shaft,said keys being provided With means vadapted to engage eartson the shaftwhen the keysare moved ongitudinally and rock the keys in the keyways,there being ooacting means on the keys and gears adapted to lock thegears to the shaft, and means for rotating the gears.

lin testimony whereof ll have hereunto subscribed my name in thepresence of two Witnesses.

LEON J. CAMPBELL.

l l Witnesses

